摘要:
A process for preparing aqueous emulsions from high-molecular-weight organopolysiloxanes which are solid at room temperature, in the absence of organic solvents, which comprises dissolving the high-molecular-weight organopolysiloxane which is solid at room temperature in a low-molecular-weight organo(poly)siloxane which is liquid at room temperature, and emulsifying this solution with water in the presence of an emulsifier and other additives, if desired.
摘要:
A fastening mechanism for mounting operating equipment or the like, particularly on electric household equipment has bayonet catch-like tension members for engaging in a panel. Each tension member can have in a slightly resiliently movable region on one side, a shoulder surface for the inclined supporting on the outside of the panel and on the other side can have a wedge surface for the self-cutting engagement in a boundary edge of a passage opening of the panel. Accompanied by self-compensating position adaptation, the tension member is not only braced with the shoulder surface under pretension against the outside of the panel, but is also wedged at right angles thereto in the passage opening.
摘要:
A dyestuff useful for dyeing and printing synthetic, hydrophobic fibers or mixtures thereof with cellulose fibers and stable under dyeing conditions is a .beta.-modification of a compound of the formula ##STR1## having an X-ray diffraction pattern under Cu-K.alpha.-radiation with high intensity lines at a diffraction angle in .theta. degrees of 3.75, 6.40 and 12.35;medium intensity lines at a diffraction angle in .theta. degrees of 6.60, 7.30, 7.60, 7.90, 8.10, 8.35, 9.30, 9.70, 9.90, 10.20, 10.50, 12.70 and 13.90;and low intensity lines at a diffraction angle in .theta. degrees of 5.65, 8.75, 11.25, 11.70, 13.35, 15.10 and 15.55; which is prepared by heating at 50.degree.-150.degree. C. the .alpha.-modification of said compound, which is unstable under dyeing conditions.
摘要:
A steam generator has a preheater for preheating feed-water supplied from an external source, the preheater receiving its heat from the steam generator's heat exchanger. If the supply of feed-water to the steam generator is reduced while the heat exchanger maintains its heat output, the feed-water is overheated. To prevent this, some of the already heated feed-water in the steam generator is fed to the feed-water entering the preheater, this raising the feed-water's temperature relative to the temperature of the heat exchanger, reducing the rate of exchange of the heat from the heat exchanger to feed-water in the preheater, and by this control preventing overheating of the water in the preheater.